I guess what baffles me is the inclusion in this game, unless the game makers happened to be fans of that movie.

The whole Reis/Beowulf subplot was cut whole cloth from another movie: Ladyhawke, where the heroic knight and his lady were cursed by a poweful preist and both transformed into animals (he into a wolf, she into a hawk). The sadistic twist is that one transforms at night the other during the day, so they're never together as humans. It's a very enjoyable film, although the keyboard soundtrack really dates it.